Ventilator.



W-, R. JOHNSON.

VBNTILATOR.

APPLICATION FILED FEB 18, 1911.

Patented Feb. 17, 1914.

1 Z% Z% Z i 4% v f fig 3 1 1 y 5 a 7 Z 32 p /5 1 i. 5y 4 Jr w [J i Q J jm l5 fl Z2 3 Inventor V I I Wit esss Attorneys WILLIAM R. JOHNSON, OFNEW DECATUR, ALABAMA.

VENTILATOR.

To all whom it may concern Be it known that 1, WILLIAM R. Jorrnson, acitizen of the United States, residing at New Decatur, in the county ofMorgan and State of Alabama, have invented a new and useful Ventilator,of which the following is a specification.

This invention relates to ventilators for skylights.

The objects of the invention are to improve and simplify theconstruction of such devices as well as to increase their fireproof andwater-tight qualities and to adapt them to receive interchangeable tops,whereby they may be equipped with either glass or metal tops.

Further objects of the invention are to provide simple and convenientmeans for opening and closing the ventilator and for holding it in openposition in such manner as to cause it to close automatically in case offire.

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of invention herein disclosed can be made within the scope ofwhat is claimed without departing from the spirit of the invention.

In the accompanying drawing forming part of this specification, Figure 1is a vertical central section through a ventilator constructed inaccordance with the present invention; Fig. 2 is an under plan view ofthe lowermost bridge piece in Fig. 1, showing the key-hole slot whichcooperates with the chain for holding the damper of the ventilator inopen position; Fig. 3 is a section on the line 83 of Fig. 1, showing thecross sectional shape of the bridge piece illustrated in Fig. 2; Fig. 1is a detail view in vertical section showing on an enlarged scale theupper left-hand portion of the ventilator shown in Fig. 1, and showingthe use of a flat, transparent or glass top; Fig. 5 is a view similar toFig. l, showing the flat, transparent top piece removed and a metalliccone shaped top piece inserted in place thereof.

Like reference numerals indicate corresponding parts in the differentfigures of the drawing.

The ventilator of the present invention is Specification of LettersPatent.

Application filed February 18, 1911.

Patented Feb. 1?, 1914.

Serial No. 609,421.

constructed with a stem 1, which is preferably in the form of avertically extending cylinder. Extending transversely across the stem 1is a lower bridge piece 2 and an upper bridge piece 3. Each of thebridge pieces 2 and 3 is in the cross sectional form of a channel ironor brace as shown in Fig. 3 of the drawing. Each of the bridge pieces 2and 3 is secured to the stem 1 by means of downwardly extending integralflanges 4 formed at the ends of said bridge pieces, said flanges beingriveted or otherwise secured to the inner walls of the stem 1, asindicated at 5. The lower bridge piece 2 is formed with a centralcircular opening 6, a chain opening 7 and a key-hole slot 8. The upperbridge piece 3 is formed with an opening 9' directly above the opening6, said alined openings 6 and 9 serving slidably to receive a supportingrod 10 having at its upper end a spider arranged in plan view like anequilateral or Maltese cross, indicated by the numeral 11, the arms ofsaid spider having secured to their outer ends a circular rim 12.Resting upon the spider 11 is a circular plate 12 of glass or othertransparent or opaque material which is held in place by means of aflange 13 formed on the rim member 14.- which is riveted to the rim 12,and is provided at its lower end with a downwardly and outwardly flaringflange 15 which, when the damper 12 is in lowered or closed position,rests upon the upper edge of a louver 16 which is secured in anysuitable manner to the stem 1. The flaring flange 15 of the transparentdamper 12 when the damper is in closed position, fits on the outside ofthe upper edge of the stem 1 so as to make a water-tight closure,adapted to shed water onto the louver 16.

This water-tight construction is of impor-' tance in case any rain ormoisture leaks or beats inside the ventilator. The damper 12 thuspossesses advantages over the usual sliding sleeve which is employed forclosing the ventilator and which slides on the inside of the stem 1 sothat if any moisture beats against the outer surface of said sleeve whenraised to the position which it occupies in closing the ventilator, suchmoisture will be free to trickle down inside the stem 1.

The supporting rod 10 for the damper 12 has secured to its lower end asupporting chain 17 provided with a link 18 formed of any suitablefusible material intended to melt in case of fire, so as to permit theautomatic closing of the ventilator. The chain 17 extends upwardlythrough the chain receiving opening 7 of the lower bridge piece 2, thenaround a pulley 19 supported by the upper bridge piece 3, and thendownward through the key-hole slot 8 in the lower bridge piece 2, saidchain 17 being provided at its lower end with a ring 20. In opening thedamper 12, the ring 20 is pulled downward, and by inserting one of thelinks of the chain into the small end of the key-hole slot 8, the damper12 can be held in raised position.

The lower louver 16 is formed with openings 21 through which projectoutwardly and upwardly extending supports 22 which are formed of narrowflat metal bars and are secured at their lower ends to the outer surfaceof the stem 1, as indicated at 23. About midway of their length thesupports 22 have secured thereto, as indicated at 24, outwardlyextending arms 25 having their ends 26 bent upwardly and secured at 27to a corrugated rim 28 which serves to break the force of wind and rain.An intermediate louver 29 is secured at its lower edge in any suitablemanner, as indicated at 30, to the outwardly extending arms 25 and atits upper edge, as indicated at 31, to the supports 22.

The upper ends of the supports 22 are downwardly and outwardly bent, asindicated at 32, and have secured thereto, at 33, an upper louver 34,the lower edge of which is corrugated, as indicated at 35. At its upperedge, the louver 34 is formed with an upwardly directed cylindricalextension 36 which is preferably integral with the louver 34. The top 37in Figs. 1 and 4 is formed of wired glass and rests upon a top support38 in the form of a cylindrical member having an outwardly directedannular flange 39 at its upper end which bears against the lowerperiphery of the top 37. A clamping part 40 which is channeled shape incross section and has its flanged ends 41 detachably secured together bymeans such as the bolt 42, serves to secure the top 37 in position insuch manner that it may be readily removed and replaced by a metal top43, preferably of the shape illustrated in Fig. 5 of the drawing.

The top support 38 at its lower end is provided with an inwardlyextending annular flange 44 which is formed with a plurality of weepholes 45. The inwardly extending flange 44 is disposed below the upperedge of the cylindrical member 36 of the louver 34. At its inner edgethe flange 44 is provided with a downwardly extending cylindrical flange46 which is riveted or otherwise suitably secured to the cylindricalextension 36 of the louver 34. The cover support 38 in connection withthe flange 44 and the tubular extension 36 serves to produce a gutterwhich is adapted to receive water of condensation deposited on the innerwalls of the ventilator, said water of condensation being permitted todrain off through the weep holes 45 in the flange 44.

By reason of the fact that the ventilator opening through the stem 1 andthe cylindrical extension 36 is closed by two thicknesses of heavy wiredglass, as indicated at 12 and 37, it is apparent that in case of fireboth of these glass plates must be broken through before the flames havea direct unretarded outlet.

Other advantages of the invention are obvious from the foregoingdescription in connection with the drawing.

What is claimed is:

1. A ventilator comprising a stem, upper and lower bridge piecestherein, the lower bridge piece having a chain opening and a key-holeslot therein, a supporting rod slidably extending through said bridgepiece, a damper at the upper end of said rod, a pulley on the upperbridge piece, and a chain connected with said rod and extending upwardthrough said chain hole, around said pulley, and then through saidkey-hole slot. 7

2. A ventilator comprising a stem, upper and lower channel shaped bridgepieces therein, the lower bridge piece having a chain opening and akey-hole slot therein, a supporting rod slidably extending through saidbridge pieces, a damper at the upper end of said rod, a pulley on theupper bridge piece, and a chain connected with said rod and extendingupward through said chain hole, around said pulley, and then throughsaid key-hole slot.

3. A ventilator comprising a louver having a cylindrical upwardextension at its inner edge, a cylindrical top support spaced from saidextension and having at its lower edge an inwardly extending flangeprovided with weep holes, said flange having at its inner edge adepending flange secured to the extension of said louver, and a topcarried by said top support.

4. A ventilator comprising a louver having a cylindrical upwardextension at its inner edge, a cylindrical top support spaced from saidextension and having at its lower edge an inwardly extending horizontalflange provided with weep holes, said flange having at its inner edge adepending flange WILLIAM R. JOHNSON.

is connected to said damper actuating rod, the lower of said transversesupports forming a guide for said chain, a chain support carried by theupper of said trans- 5 versely disposed supports, and chain lock-Witnesses:

ing means carried by the lower of said trans- F. A. BLooDWoRTH,

versely disposed supports. E. E. GRAVES.

Copies of this patent may be obtained for five cents each, by addressingthe Gommissioner of latents, Washington, D. G.

